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Preview of FancyTracker-FF

FancyTracker-FF by Erik Zettergren

A browser extension for monitoring and analyzing PostMessages and listeners in web pages.

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About this extension
This is a modern adaptation of the original postMessage-tracker by Frans Rosén. The base logic and functionality still exists (at least it should work the same), although it has been built upon quite a lot.

A LOT of vibing has been going on in here, especially for this port over to Firefox due to repeated requests of the original chrome version over at https://github.com/Zeetaz/FancyTracker.
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Permissions and data

Required permissions:

  • Access browser tabs
  • Access your data for all websites

Optional permissions:

  • Access your data for all websites
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More information
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Version
1.1.0
Size
1.91 MB
Last updated
10 months ago (Sep 9, 2025)
Related Categories
  • Web Development
License
MIT License
Version History
  • See all versions
Tags
  • security
  • user scripts
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